// Command を使う場合, e.Parameter で必要なデータをやり取りする。
// XAML 側で CommandParameter を指定しない場合, null.
void CustomerDetailExecuted(object sender, ExecutedRoutedEventArgs args)
{
int id = ((Customer)args.Parameter).Id;
if (customerEditWindows.ContainsKey(id))
{
customerEditWindows[id].Focus();
}
else
{
var dialog = new CustomerEditWindow(id, OnCustomerChanged);
customerEditWindows.Add(id, dialog);
dialog.Closed += (s, e) => { customerEditWindows.Remove(id); };
dialog.Show();
}
}
// 新しい顧客...
void NewCustomerCommand(object sender, ExecutedRoutedEventArgs e)
{
var dialog = new CustomerEditWindow(0, OnCustomerChanged);
dialog.Show();
}